Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem hospedou o time visitante Baltimore Ravens?
 ###Tabelas: CREATE TABLE mallet_and_simple_articulated_locomotives (mallet_and_simple_articulated_locomotives_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Wheel arrangement VARCHAR, Fleet number(s) VARCHAR, Manufacturer VARCHAR, Serial numbers VARCHAR, Year made VARCHAR, Quantity made VARCHAR, Quantity preserved VARCHAR) CREATE TABLE series_2_2000_2001 (series_2_2000_2001_id AUTO_INCREMENT PRIMARY KEY, Episode # INT, Production Count INT, Original Airdate VARCHAR, Prod. Code VARCHAR, Title VARCHAR, Viewing Figures Millions VARCHAR) CREATE TABLE most_doubles_wins (most_doubles_wins_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, TKM career VARCHAR, Ties INT, Dou W/L VARCHAR, Sin W/L VARCHAR) CREATE TABLE taiwan (taiwan_id AUTO_INCREMENT PRIMARY KEY, 2010 ARWU Rankings VARCHAR, 2010 QS World Rankings VARCHAR, 2010 QS Asian Rankings VARCHAR, 2010 eduniversal Rankings VARCHAR, 2009 QS Asian Rankings: Int’l faculty review VARCHAR, 2009 QS Asian Rankings: Int’l student review INT, 2000 Singapore “Asiaweek” Rankings VARCHAR, University VARCHAR, Local VARCHAR, Median ranks INT) CREATE TABLE 2006_season (2006_season_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Visiting team VARCHAR, Final score VARCHAR, Host team VARCHAR, Stadium VARCHAR)  
SELECT Host team FROM 2006_season WHERE Visiting team = baltimore ravens